<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>更新时的一个问题</title>
      <!-- 引入vue -->
      <script type="text/javascript" src="../js/vue.js"></script>
</head>
<body>
   
    <div id="root">
        <!-- 遍历数组 -->
        
        <h2>人员列表</h2>
        <button @click="updateMei">更新马冬梅的信息</button>
        <ul>
            <li v-for="(p,index) of persons" :key="p.id">
                {{p.name}}-{{p.age}}-{{p.sex}}
            </li>
        </ul>

    </div>
       
</body>
<script type="text/javascript">
    Vue.config.productionTip = false //阻止vue在启动生成生产提示。
   
  //用computed实现
  const vm = new Vue({
        el:'#root',
        data:{
            persons:[
                {id:'001',name:'马冬梅',age:'38',sex:'女'},
                {id:'002',name:'周冬雨',age:'19',sex:'女'},
                {id:'003',name:'周杰伦',age:'80',sex:'男'},
                {id:'004',name:'温兆伦',age:'21',sex:'男'}
                ],
        },
            methods: {
                updateMei(){
                    // this.persons[0].name='马老师'
                    // this.persons[0].age='43'
                    // this.persons[0].sex='男'
                    this.persons[0]={id:'001',name:'马老师',age:'38',sex:'男'}
                }
            }
           
        
     })
    </script>
  </script>
</html>